The declining activity of the growth hormone-insulin-like growth factor I (IGF-I) axis with advancing age may contribute to the decline in lean body mass as well as the upsurge in mass of adipose tissue that occur with aging. Increased muscle mass: People who work out consistently normally find a drastic increase in muscle mass on the initial HGH cycle, and moderate increase on Website URL: http://policebrandy62.sosblogs.com/The-first-blog-b1/Sytropin-Review-b1-p2.htm